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Vomiting (also called throwing up, emesis, and by various informal terms) is the forceful expulsion of the contents of one's stomach through the mouth and sometimes the nose. Undesired vomiting may result from many causes, ranging from gastritis or poisoning to brain tumors, or elevated intracranial pressure. The feeling that one is about to vomit is called nausea. It usually precedes, but does not always lead to vomiting. Antiemetics are sometimes necessary to suppress nausea and vomiting, and, in severe cases where dehydration develops, intravenous fluid may need to be administered to replace fluid volume.

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Wikipedia About Vomiting

Vomiting (also called throwing up, emesis, and by various informal terms) is the forceful expulsion of the contents of one's stomach through the mouth and sometimes the nose. Undesired vomiting may result from many causes, ranging from gastritis or poisoning to brain tumors, or elevated intracranial pressure. The feeling that one is about to vomit is called nausea. It usually precedes, but does not always lead to vomiting. Antiemetics are sometimes necessary to suppress nausea and vomiting, and, in severe cases where dehydration develops, intravenous fluid may need to be administered to replace fluid volume.

49-aspetti%20di%20vita%20quotidiana%2C%20vomito%2CTaccuino%20Sanitatis%2C%20Ca.jpg

Vomiting is different from regurgitation, although the two terms are often used interchangeably. Regurgitation is the return of undigested food (that has not yet reached the stomach) back up the esophagus to the mouth. The causes of vomiting and regurgitation are generally different.

Vomiting

Receptors on the floor of the fourth ventricle of the brain represent a chemoreceptor trigger zone, known as the area postrema, stimulation of which can lead to vomiting. The area postrema is a circumventricular organ and as such lies outside the blood-brain barrier; it can therefore be stimulated by blood-borne drugs that can stimulate vomiting or inhibit it.

There are various sources of input to the vomiting center:

  • The chemoreceptor trigger zone at the base of the fourth ventricle has numerous dopamine D2 receptors, serotonin 5-HT3 receptors, opioid receptors, acetylcholine receptors, and receptors for substance P. Stimulation of different receptors are involved in different pathways leading to emesis, in the final common pathway substance P appears to be involved.
  • The vestibular system which sends information to the brain via cranial nerve VIII (vestibulocochlear nerve). It plays a major role in motion sickness and is rich in muscarinic receptors and histamine H1 receptors.
  • Cranial nerve X (vagus nerve), which is activated when the pharynx is irritated, leading to a gag reflex.
  • Vagal and enteric nervous system inputs that transmit information regarding the state of the gastrointestinal system. Irritation of the GI mucosa by chemotherapy, radiation, distention, or acute infectious gastroenteritis activates the 5-HT3 receptors of these inputs.
  • The CNS mediates vomiting arising from psychiatric disorders and stress from higher brain centers.

Act

The vomiting act encompasses three types of outputs initiated by the chemoreceptor trigger zone: Motor, parasympathetic nervous system (PNS), and sympathetic nervous system (SNS). They are as follows:

  • Increased salivation to protect the enamel of teeth from stomach acids (excessive vomiting leads to dental erosion). This is part of the PNS output.
  • A deep breath is taken to avoid aspiration of vomit.
  • Retroperistalsis, starting from the middle of the small intestine, sweeping up the contents of the digestive tract into the stomach, through the relaxed pyloric sphincter.
  • A lowering of intrathoracic pressure (by inspiration against a closed glottis), coupled with an increase in abdominal pressure as the abdominal muscles contract, propels stomach contents into the esophagus as the lower esophageal sphincter relaxes. The stomach itself does not contract in the process of vomiting except for at the angular notch, nor is there any retroperistalsis in the esophagus.
  • Vomiting is ordinarily preceded by retching.
  • Vomiting also initiates an SNS response causing both sweating and increased heart rate.

Search results for Vomiting

VOMITING

This isn't really considered a vomiting problem but rather a coughing problem. ... Vomiting usually does not last more than 12 hours. ...www.askdrsears.com/html/8/T083300.asp

Nausea and Vomiting

WebMD explains what causes nausea and vomiting and a looks at what to do about it. ... The causes of vomiting differ according to age. ...www.webmd.com/digestive-disorders/digestive-diseases-nausea-...

Vomiting - DrGreene.com

The common cause of vomiting is a child with a viral gastrointestinal infection such as ... Infections elsewhere in the body can also cause vomiting. ...www.drgreene.com/21_1219.html

vomiting: Definition from Answers.com

Vom·it·ing n. The spasmodic ejection of matter from the stomach through the mouth. ... World of the Body: vomiting ... Vomiting may be preceded by nausea, ...www.answers.com/topic/vomiting

Vomiting

Vomiting: Pet Health Topics is a collection of articles written at the College ... Primary or gastric causes of vomiting are those that are due to diseases of the ...www.vetmed.wsu.edu/ClientED/vomiting.aspx

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News about Vomiting

Treating Extreme Nausea, Vomiting During Pregnancy

redOrbitCollaborative Canada-France study published in European Journal of Obstetrics and Gynecology and Reproductive BiologyNausea and vomiting are telltale indicators of pregnancy, affecting more than 80 percent of future mothers.http://www.redorbit.com/news/health/1683812/treating_extreme...

Treatment For Extreme Nausea, Vomiting During Pregnancy

Science DailyA new medication protocol for treating extreme nausea and vomiting during pregnancy appears effective in improving symptoms more quickly and provides a safer option than those previously available.http://www.sciencedaily.com/releases/2009/05/090506110200.ht...

Blog: About Town Headlines

StuffIt's hard to get excited about swine flu. Way more people have died on the road, and kipping on the sofa for that matter, than have died from swine flu, since it was launched with great media fanfare onto the world and I think we are all sick to death of the scaremongering.http://www.stuff.co.nz/sunday-star-times/entertainment/blog-...

Toll from consumption of contaminated water 11

The HinduTwo more residents of Bholakpur in Hyderabad die on Sunday, increasing the tollhttp://www.thehindu.com/2009/05/11/stories/2009051156240100....

Confirmed Swine Flu Cases in U.S. Near 2,300 Mark

HealthDay via Yahoo! NewsSATURDAY, May 9 (HealthDay News) -- The swine flu count in the United States now stands at 2,254 confirmed cases and 722 probable cases in 44 states, with 104 hospitalizations, federal health officials said Saturday.http://news.yahoo.com/s/hsn/20090509/hl_hsn/confirmedswinefl...

News about Vomiting

Third U.S. Swine Flu Death Reported

ForbesOne thing we are seeing, unlike seasonal flu, a higher percentage seem to be having vomiting and diarrhea," he said. Meanwhile, a new Harvard University survey found that many Americans have taken measures to protect themselves and family members from ... http://www.forbes.com/feeds/hscout/2009/05/10/hscout626968.h...

Toll from consumption of contaminated water 11

HinduThe medical camps, being run by district medical authorities, continued to receive a large number of patients from these areas complaining of diarrhoea and vomiting. Even as the deaths have gone up to 11, the authorities at Gandhi Hospital maintained ... http://www.hindu.com/2009/05/11/stories/2009051156240100.htm

St. Louis Rams: Is 2009 The Year Of Resurrection For The G.S.O.T.?

Bleacherreport.comDoes anyone else feel like vomiting right now? Last season, the Rams had the talent to make something happen, but this year, they will have to rely on what got them to the dance to begin with. Some will say that this is yet another rebuilding season ... http://bleacherreport.com/articles/171943-st-louis-rams-is-2...

'Scrubs' fools around with enteroviruses

Los Angeles TimesDo enteroviruses cause vomiting and require hospitalization? Would the treatment be intravenous rehydration and anti-emetics? Would these treatments be off-limits to a doctor turned patient? How long does it take to develop symptoms after being ... http://www.latimes.com/features/health/la-he-unreal4-2009may...

in Morris

Recorder Community NewspapersSome people have reported diarrhea and vomiting. In the past, severe illness (pneumonia and respiratory failure) and deaths have been reported. For more information on swine flu visit www.morrishealth.org , www.njgov/health or www.cdc.gov/swineflu . ... http://www.recordernewspapers.com/articles/2009/05/10/morris...

Search results for Vomiting

Vomiting and Nausea Causes, Symptoms, Diagnosis, and Treatment on ...

Learn about the many causes of vomiting and nausea including food poisoning, viruses, vertigo, head injuries, gallbladder disease, appendicitis, migraine, brain tumors, infections ... http://www.emedicinehealth.com/vomiting_and_nausea/article_e...

Vomiting - DrGreene.com

Vomiting is an automatic reflex. An increase in saliva production may occur just before vomiting. Almost all children will vomit during their childhood. The common cause of ... http://www.drgreene.com/21_1219.html

Vomiting - WrongDiagnosis.com

List of 2288 disease causes of Vomiting, patient stories, diagnostic guides, medical books excerpts online about Vomiting, 2929 drug side effect causes, 658 drug interaction causeshttp://www.wrongdiagnosis.com/sym/vomiting.htm

Nausea and Vomiting

WebMD explains what causes nausea and vomiting and gives tips for preventing it.http://www.webmd.com/digestive-disorders/digestive-diseases-...

vomiting - definition of vomiting in the Medical dictionary - by the ...

vomiting /vom·it·ing/ (-ing) forcible ejection of contents of stomach through the mouth. cyclic vomiting recurring attacks of vomiting. dry vomiting attempts at vomiting, with ... http://medical-dictionary.thefreedictionary.com/vomiting

Wikipedia results for Vomiting

Vomiting - Wikipedia, the free encyclopedia

Vomiting (also called throwing up, emesis, and by various informal terms) is the forceful expulsion of the contents of one's stomach through the mouth and sometimes the nose.http://en.wikipedia.org/wiki/Vomiting

Defensive vomiting - Wikipedia, the free encyclopedia

Defensive vomiting is a symptom of anorexia nervosa and bulimia nervosa in which a person who has drastically over-eaten (generally in reaction to previous extreme dieting) vomits ... http://en.wikipedia.org/wiki/Defensive_vomiting

Cyclic vomiting syndrome - Wikipedia, the free encyclopedia

Cyclic vomiting syndrome (US English) or cyclical vomiting syndrome (UK English) (CVS) is a condition whose symptoms are recurring attacks of intense nausea, vomiting and sometimes ... http://en.wikipedia.org/wiki/Cyclic_Vomiting_Syndrome

Nausea - Wikipedia, the free encyclopedia

The stomach's involvement comes from the brain's conclusion that one of the senses is hallucinating due to poison ingestion; the brain then induces vomiting to clear the supposed ... http://en.wikipedia.org/wiki/nausea

Emetophilia - Wikipedia, the free encyclopedia

Emetophilia is a sexual fetish in which an individual is aroused by vomiting or observing others vomit. When emetophiles put emetophilia into practice by actually vomiting ... http://en.wikipedia.org/wiki/Emetophilia
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Guy vomiting on live tv news

Guy vomiting on live tv newsA guy throws all up on live tv show!!! really funny!!Flash - Video

CBB veteran Maggot vomited on a cat

CBB veteran Maggot vomited on a catCelebrity Big Brother veteran and Goldie Lookin Chain rapper Maggot tells his most outrageous story.Flash - Video

How the Body Works: Vomiting

How the Body Works: VomitingA description of the body's response during vomiting.Flash - Video

Hospitals tackle vomiting virus

Hospitals tackle vomiting virusPeople visiting hospitals in the UK are being told to wash their hands with soap and water to halt a sickness and diarrhoea outbreak which has already closed around 100 wards to...Flash - Video

Hospitals tackle vomiting bug

Hospitals tackle vomiting bugPatients and staff are treated and wards closed to admissions due to the spread of the norovirus.Windows Media - Video

Answers for Vomiting

cechcVomiting???cechcYou should be greatful to be vomiting....Your body is trying to rid itself of the alcohol....when you get nauseous thank your body, as if you didnt get sick you are suspect for alcohol poisoning.........shelbylittle7266What can cause vomiting and tremors in a dog?shelbylittle7266There is a LONG list of things that can cause this. The dog needs to see a vet. Shaking is often a sign of pain.o0_lady_jayne_0oCan kennel cough cause vomiting after the dog has stopped coughing?o0_lady_jayne_0oVomiting is NOT a symptom of kennel cough. Time to call your vet!Mac pWhat tablets can be taken to stop vomiting in early pregnancy?Mac pI have three children and am currently pregnant. I have vomited from conception to delivery for all four pregnancies. There are a couple different medications out there. First off, prenatal vitamin...VolmerantiHow can i avoid vomiting and a big time headache after drinking heavily the night before?Volmerantidrink water or gatorade before going to bed...........and it's sound crazy, but eat a banana - i haven't had a hangover since i tried this!! whatever you do - DO NOT take tylenol after drinking -...
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